From this, we can see that the symbol of a red circle and diagonal line, which means 'prohibited' or 'NG', is commonly understood to some extent around the world.

What do the symbols in the Squid Game mean?. The square, triangle, and circle reflect the hierarchical structure and ranks of the workers in the environment where the game is played.

People only just realising what triangle and circle symbols on clothes labels mean Clothes labels are full of strict instructions on how to wash our laundry but many have probably never looked at ...